Sayo Kadoya
Joji Yuki
Joji Yuki is a mysterious young man with a prosthetic arm who has the ability to become Riderman. He was a scientist who worked for Dai-Shocker and was involved in the production of the Decadriver and the Diendriver. For unknown reasons, Yuki rebelled against Dai-Shocker and was punished through the amputation of his arm. This has made him a wanted man in the Decade World.
Yuriko Misaki / Human Tackle
Yuriko Misaki is a girl who lives in this A.R. World who meets Tsukasa during his rampage against the Kamen Riders. She follows Tsukasa, urging him along in his mission to be the destroyer of worlds. It is said that she died in a fight with the Bee Woman years in the past but due to having never found her place in the world, she still searches for it even in death. She finds her place with Tsukasa, the only one who cared for her. In the end, she sacrifices herself to mortally wound the Bee Woman with her Ultra Cyclone attack and save Natsumi from her. Now able to rest in peace having finally having found her place and avenged her death, she disappears. Yuriko has the ability to transform into Electro-Wave Human Tackle.